Finally, you will end up with a fully functioning package of extensions that you can use on your own site or share with others.
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I personally use Eclipse, which can be slow when used on older computers, but if you have a fast processor such as an i7, it works great. The first thing to note is that Joomla! The encoding on files must be set to UTF-8, as some other languages need this encoding to display all the different characters, and it is important that Joomla! The closing PHP tag? There are still some minor inconsistencies with the standards used in the core code, but this is improving with each version.
It's always best to make your code as similar in style to the core code as possible, as it will make it easier for other people to customize your code to suit their purposes.
There is nothing worse than wanting to make a minor change to an extension and finding that the developer's code looks nothing like what you are familiar with, so you waste a lot of time just trying to reverse engineer it. It should be noted that any IDE worth its salt can reformat the code to suit the operator's preference, so minor formatting problems are only really an issue if you are using a basic text editor.
The view displays all the data, but doesn't care how the data is stored; that's the job of the model. The controller tells the model and the views what to do. New MVC classes were introduced in Joomla!
Platform CMS for Joomla! Most people are still using the older MVC classes which have been renamed with the Legacy suffix. The core extensions in Joomla! So what is the point of this change? The UCM idea is to have a single content structure that would be used for all the extensions, and this will allow them to interact more easily. Essentially, if you develop a comments plugin for one extension, it will automatically work for every other extension due to the consistent data structure.
There is still a lot of work that needs to be done to implement UCM, but we may start seeing it around Joomla! There are still not many good examples of the new MVC and the documentation is limited, so my advice is to stick with the legacy classes for now.
CMS roadmap released in March actually indicates that we will roll MVC legacy classes back to their original names and drop the Legacy suffix. Providing Joomla! Any code we write now for Joomla! This MVC rollback may introduce a small backwards compatibility issue for those already using the new MVC that are using type hinting, for example if the new JModel was renamed to JModelInterface , so this is another reason why you wouldn't bother adopting the new MVC classes yet.
Using the legacy classes introduces a problem. What if you want to support Joomla! For example, Joomla! There are workarounds for this, for instance you could create a legacy. Then you can load this following code into your component's main PHP file.
This effectively does what Joomla! If you wanted to use the new MVC classes, then your extension will only be able to support Joomla! What about Joomla! Well, the above code would possibly make your extension work on these versions too. However there are quite a few other functions that have changed, so you are going to run into other problems.
For example, JDate::toMysql was removed in Joomla! As Joomla! If anyone has told you that all you need to do to upgrade an extension from Joomla! This may be true for very simple extensions that are already following best practices, but in reality there is a lot more work involved.
There were a number of functions that were deprecated or changed, and with the introduction of Bootstrap, the backend interface has undergone some significant changes. So to make the extension work well on Joomla! The following section details a lot of the changes you will need to make to get your extension working in Joomla!
Some of the changes are quite subtle, such as changing the nameQuote to QuoteName , but some require a bit more work than just finding and replacing, such as the changes from getTableFields to getTableColumns. One change I'd like to highlight is the removal of DS that was commonly used for the directory slashes in previous Joomla!
Although you could define a DS constant to avoid having to change your code, I would recommend that you make the effort and update your code. For plugins and modules, this is probably all you need to do to them and they will work, but for components it is not quite that easy. Even after you've made all these changes, although your extension may work in Joomla! You will see an example of this in the following screenshot, where there are unnecessary bullet points and a field that is only partially showing:.
Since Joomla! All the detailed changes necessary to convert a Joomla! The following screenshot shows the same form as shown in the previous screenshot, however this one has been fully updated to support Joomla!
When you are creating a new extension for Joomla! This book is going to cover creating an extension from scratch, so you can learn all the basics.
Once you know these, you may wish to fork the extensions we make together or even fork one of your own extensions to save you a lot of time if you need to make something similar. There are several extension building components that will prompt you for a bit of information, then create a basic component, plugin, or module based on the information you provide. EasyCreator is one such extension that I have used in the past, but you still need to know the basics to be able to modify this automatically generated code to suit your needs.
If you want to know more about these types of extension building components, you can refer to the development category within the miscellaneous category on the JED. With regards to forking someone else's extensions, you probably should first approach the developer and discuss your ideas and see if there is an opportunity to work together to make the original extension even better.
If the developer has lost interest in further developing the extension or if you have a completely different vision that will take the software down an entirely different path, then there may be an opportunity to fork the extension rather than starting over from scratch. Now you should have some idea about the differences between a plugin, a module and a component. We discussed what Joomla! We touched on some of the new features of Joomla! We discussed some of the common business models used by Joomla!
We briefly looked at the coding standards, and then talked about MVC and why we should use the Legacy classes. We talked about upgrading existing Joomla! Now get ready for the next chapter where we will start to get our hands dirty with some coding that you can follow along with to create your first Joomla! Tim Plummer is a Joomla! Tim has developed and maintained several popular components, modules, and plugins, which are listed on the Joomla!
Extension Directory, in addition to his day job in IT for a multinational manufacturer. Tim lives in Sydney, Australia, with his wife, Tamlyn, who runs her own design agency and two kids, Zane and Ava-Lily, who keep Tim very busy. At university Tim studied Engineering, and he has a Bachelor of Engineering in Telecommunications Engineering degree, however his passion in IT has been his career focus. Tim is very active in the Joomla! Day Sydney conference since , taking on the coordinator role in Tim has run Joomla!
About this book Joomla 3 is the first of the major open source content management systems that was meant to be mobile friendly by default. Publication date: July Publisher Packt. Pages ISBN Chapter 1. Before you Start. The various types of Joomla! Extension types and their uses.
What's new in Joomla! Implements new design and features. Develops new extensions or works with other extension developers for site enhancements. Investigates and solves site errors reported by the team, end-users or developers. WhatsApp us. Joomla Extension Development. View Larger Image.
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